Paradox.

About Paradox

Paradox is a finite-domain model finder for pure first-order logic (FOL) with equality developed by Koen Lindström Claessen and Niklas Sörensson at the Chalmers University of Technology. It can a participate as part of an automated theorem proving system. The software is written mostly in the programming language Haskell. It is free and open-source software released under the terms of the GNU General Public License.